What is the main goal of visual testing before product deployment?

The main goal of visual testing before product deployment is to detect visual discrepancies. Visual testing focuses on identifying differences in the rendered UI compared to expected designs. This is crucial because even small visual defects can impact user experience and overall perception of the product. Visual testing ensures that elements such as layout, colors, fonts, and overall aesthetic consistency align with the specified design requirements, providing confidence that the application appears as intended to end-users.

While enhancing performance speed, ensuring functionality, and lowering production costs are important aspects of product development and quality assurance, they do not specifically address the visual integrity of the application. Visual testing uniquely targets the visual presentation, which is essential for maintaining brand consistency and meeting user expectations.